Wow, just wow. Very nice to see an echochrome (One of the games I've been loving the most for PSP) clone for the DS. Hopefully in the future you'll replace the ball with a person or something else that's a 'catchy' trademark of sorts for your game, but anyhow, as of yet, it seems great. One thing that I've noticed is that you use slopes in that demo, and the only downside I see ot this is that i t's hard to tell it's a slope at certain angles, and although shading would fix this problem it would present others. That's just my take on that anyhow, and besides that, I love it!